nihal0107 commented on a change in pull request #3819:
URL:
https://github.com/apache/carbondata/pull/3819#discussion_r450844563##########
File path: sdk/sdk/src/main/java/org/apache/carbondata/sdk/file/ParquetCarbonWriter.java
##########
@@ -0,0 +1,116 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *
http://www.apache.org/licenses/LICENSE-2.0+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.carbondata.sdk.file;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+
+import org.apache.avro.generic.GenericRecord;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.Path;
+import org.apache.parquet.avro.AvroReadSupport;
+import org.apache.parquet.hadoop.ParquetReader;
+
+/**
+ * Implementation to write parquet rows in avro format to carbondata file.
+ */
+public class ParquetCarbonWriter extends AvroCarbonWriter {
+ private AvroCarbonWriter avroCarbonWriter = null;
+ private String filePath = "";
+ private boolean isDirectory = false;
+ private List<String> fileList;
+
+ ParquetCarbonWriter(AvroCarbonWriter avroCarbonWriter) {
+ this.avroCarbonWriter = avroCarbonWriter;
+ }
+
+ @Override
+ public void setFilePath(String filePath) {
+ this.filePath = filePath;
+ }
+
+ @Override
+ public void setIsDirectory(boolean isDirectory) {
+ this.isDirectory = isDirectory;
+ }
+
+ @Override
+ public void setFileList(List<String> fileList) {
+ this.fileList = fileList;
+ }
+
+ /**
+ * Load data of all parquet files at given location iteratively.
+ *
+ * @throws IOException
+ */
+ @Override
+ public void write() throws IOException {
+ if (this.filePath.length() == 0) {
+ throw new RuntimeException("'withParquetPath()' " +
+ "must be called to support load parquet files");
+ }
+ if (this.avroCarbonWriter == null) {
+ throw new RuntimeException("avro carbon writer can not be null");
+ }
+ if (this.isDirectory) {
+ if (this.fileList == null || this.fileList.size() == 0) {
+ File[] dataFiles = new File(this.filePath).listFiles();
+ if (dataFiles == null || dataFiles.length == 0) {
+ throw new RuntimeException("No Parquet file found at given location. Please provide " +
+ "the correct folder location.");
+ }
+ Arrays.sort(dataFiles);
+ for (File dataFile : dataFiles) {
+ this.loadSingleFile(dataFile);
+ }
+ } else {
+ for (String file : this.fileList) {
+ this.loadSingleFile(new File(this.filePath + "/" + file));
+ }
+ }
+ } else {
+ this.loadSingleFile(new File(this.filePath));
+ }
+ }
+
+ private void loadSingleFile(File file) throws IOException {
+ AvroReadSupport<GenericRecord> avroReadSupport = new AvroReadSupport<>();
+ ParquetReader<GenericRecord> parquetReader = ParquetReader.builder(avroReadSupport,
+ new Path(String.valueOf(file))).withConf(new Configuration()).build();
+ GenericRecord genericRecord = null;
Review comment:
changed as per suggestion.
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